Is Cysteic Acid safe in cosmetics?
Cysteic Acid has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted.
Good
Cosmetic Ingredient
Cysteic Acid
Cysteic Acid (CAS 1187‑93‑5 (commonly cited for cysteic acid)) is classified as a cosmetic ingredient. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 1187‑93‑5 (commonly cited for cysteic acid) →
Auto-generated CPSR Part A draft with source citations
Safety Rating
GOOD
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Not specifically regulated; eligible as cosmetic ingredient under general safety requirement; covered conceptually by CIR review of α-amino acids as a cosmetic class
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Cysteic Acid.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Cysteic Acid.
Frequently Asked Questions
Is Cysteic Acid allowed in the EU?
Cysteic Acid EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
Compliance Tools
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Ingredient Decoder
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82 Allergen Checker
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Substance Compliance
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MoS Calculator
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Heavy Metal Limits
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